Apparatus for coagulating rubber latex.



S. E. DAVIDSON.

APPARATUS FOR. COAGULATING RUBBER LATEX.

APPLKCATIQN FIL'ED OVCTH, |915.

Patented July 4, 1916.

4 SHEETS-SHEET-L S. C. DAVIDSON. APPARATUS Fon CAGULATING RUBBER LATEX.

APPLICATION 'FILEUCTIL i915.

Puented Julv 4 4 SHEETS-SHEET 2.

S. C. DAVIDSON.

APPARATUS FOR COAGULATING RUBBER LATEX,

APPLICATION FILED OCT. 1 4. 1915.

Fammi July 4, 1916.

4 SHEETS-SHEET 3.

www

A www S. C. DAVIDSON.

APPARATUS FOR COAGULATING RUBBER LATEX.

APPLICATION FILED OCT. I4, |915.

Patented July 4, 1916.

4 SHEETS-SHEET 4.

SAMUEL CLELAND DAVIDSON; 0F BELFAST, IRELAND.

APZPARATUS FOR COAGLATING RUBBER LATEX.

Specification of Letters Patent.

applicationr 1aed october 14, 1915. Serrara. 55,856.

. To all whom it may concern Be it known that I, SAMUEL CLELAND DAVIDSON, a subject of the King of Great Britain, residing at Sirocco Engineering Vorks,Belfast, Ireland, have invented certain new and useful Improvements in Apparatus fon Coagulating Rubber Latex, of

which the following is a specification.

This invention relates to apparatus wherein rubber is coagulated from the fluid latex by adding dilute acid o'r other coagulant thereto V(hereinafter referred to as the coagulant) and has for its object to provide improved apparatus for this purpose.

According to this inventionY the latex is caused to flow to and `fro in an oscillating receptacle having an approximately central opening in its top adapted to permit the said coagulant to be gradually added during the oscillating movement of the receptacle. T he to and fro motion of the oscillating receptacle, which is hereinafter referred to as the cradle, may be produced by swinging, oscillating, rocking, or reciprocating the cradle. The said coagulant maybe addedA to the latex 1n the cradle during oscillation- 1n any suitable manner, and the coagulated,

rubber and mother liquid may be discharged from the cradle in any convenient manner.

The cradle may be supported bylinks slung'from above, or extending up from below7 or it may slide horizontally upon a' hase, or in suitable guides, or it may be fitted to rock to and fro upon a pivot. lVhen slung from the links. these may extend vertically upward from. at, or near the ends of the ,radle to the support,` or they.

may be convergent or divergent.

The cradle may be made to such a curvature in relation to the motion due to the method of supporting it, that the to and fro motion will cause the liquid to'run along'to the ends, and be then turned `over by the curvature at the ends and fall about midway between the two ends on to the top of the liquid in the base of thei'cradle without spilling. v

The accompanying drawings show one construction of apparatus madevin accordance with this invention. ,v .y

Figure I1 is a side elevation of the apparatus; Fig. .2 isan end eleVationQFig. 3 -is a plan;A Figs. 4, 5 and 6 show details of the cradle to an enlarged scale;A Figs. 7 and 8.

are detail views slightly enlarged showing the cradle in the two opposite dischargingpositions. y

Referring to the drawings o represents the swinging cradle which is of elongated form, with a gently curved basecarried.up

in curvilinear, or semi-circular ends a', giv

ing the cradle a somewhat kidney shape in longitudinal section. The curved over ends a are carried forward along the-top about half-Way between'the ends and the center, of the cradle, so as lto leave a central open part I) for pouring in the latex and adding theco-v agulating acid. The links c are attached to the cradle s0 as to permit its being swung to and fro by any suitable means. For eX- ample,-a crank or eccentric such as f with a suitable connecting rod c may be employed for this purpose. i'

A tank Z is provided for the coagulant which in this casemay be diluted. coagulating acid. The Said tank is located labove, the cradle a., and a suitable cock such `as a and preferably ay measuring device is provided so vthat the coagulant inmeasured quantity can A to and fro motion is imparted to the"v Patented July 4, 1916.-

cradle through the connecting rod e by means of the crank f which may berotated by means ot' the belt pulleys g or other suitable device. An alternative means of swing,- ing the cradle by hand is provided by handle k.

The cradle a and gear are carried upon the frame work j and lo whichcan be made of wood, metal `or other suitable materiah The tank Z for the 'coagulant is arranged on 'top ofthe frame work connected hy a small pipe to anauxiliary tank m, which is so pro-l portioned that it holds a known quantity off coagulant bearing a definite relationto the quantity ofllatex to be coagulatedin the' the so arranged 'that only one can be open at time, the other boing closed, thus the bot- 'coin cock is closed, and the top one opened, allowing the coagulant to flow from the tank Z into the auxiiiaryptank m; then the top cock closed and the bottom one opened, thus permitting the coagulant to fall or drip into the cradle, where it mixes with the lates during the coagulating process. An 1g air pipe s s connects this auxiliary tank with the atmosphere at a higher level than the top of the upper or main supply tank.

The. enlarged Figs. fl, and 6 show that the particular cradle illustrated is made in halves and bolted, 'together on the vertical center line. Trunnion bearings are provided at the .lower end of the links so that the cradle o may be turned over Jfor emptying. lorinally, the cradle is prevented 2,3 from 5;urni-r over spring catch p, but

when this A'sengjfag l, the cradle may be turned over "fo either side by means of the handle As an illustration of how the machine is worked, the laten to be coagulated is filled into the cradle to the extent .of say about* cnc-third its depth. The coagulant is then allowed to flow from the large tank l into the auxiliary tank m, a suitable fill of which 3g when diluted coagulant acid is' employed is about heli. the bulk of the diluted coagulating acid, to that of the latex to be coa-gw lated in the cradle. The supply is new cut oil from the large tank, the tap of the auxiliary is opened, and the acid is allowed to gentlyv flow into the cradle while they cradle is being rocked to and. fro iat a sufficient speed, to cause the duid late'X to rush from one end 'to the other of the cradle, and 4c which uid when it turns over at each end should plunge into the central part of the cradle from the upper part of the curved overends. Coagulation generally begins quickly, and, when completed the mother 4s liquor, will be found to he quite separate and apart from the coagulated rubber, and when this is the case the oscillation. of the cradle` is stopped, and the catch 7) is lifted and re leased; the cradle is now firstly turned over to tee side on which the screen g is mounted, see AFig. 7, whereupon the mother liquor cws on to one side of the deiiecting chute ff', from which it may be delivered into any convenient receptacle, or sewer.

i Then the cradle is turned to the opposite slde, see Fig,

esegesi may be for manipulating said coagulated rubber. f

What l claim as my invention and desire to secure by Letters Patent is:

l. An apparatus for coagulating rubber latex consisting of an elongated oscillating cradle in which the latex is caused to flow to and fro, .said cradle having an opening in its top through which the coagulant may be gradually added to the latex during the oscillating movement of the cradle.

2. An apparatus for coagulatingrubber latex consisting of an elongated oscillating cradle, in which the latex is caused to flow to and fro, said cradle having an opening in its top approximately midway between the ends through. which the coagulant may be gradually added to the latex during the oscillating movement of the cradle.

3. An apparatus for coagulating rubber g5 latex consisting of an elongated oscillating cradle, an approximately central opening in the top of said cradle, lmeans for oscillating said cradle and means for supplying the coagulant gradually to the latex through the said opening during the oscillating movement.

4. An apparatus for coagulating rubber latex consisting of an elongated oscillating cradle, an approximately central opening in V y the top of said cradle, means for oscillating said cradle and a regulatable measuring device for adding' the coagulant to the latex during the oscillating movement of the cradle. l

5. An apparatus for coagulating rubber latex consisting of anL elongated cradle, an approximately central opening in top of said cradle, swinging link devices for supporting said cradle and means whereby said cradle may be swung on said links for the purpose of producing an oscillating movemeut of the cradle and means for supplying coagulant gradually to the latex through said centralopening during the oscillating movement.

6. An apparatus' for ;coagulatingrubber latex consisting of an elongated cradle, an approximately central opening in the top of said cradle, swinging link devicesl for supporting said cradle," said links having a pivotal connection at ends of the cradle to permit of the swinging movement` and a trunnion like connection on the longitudinal axis' of the cradle for permitting the cradle t0 120 be turned over to one side or the other lfor discharging the contents. i 7. An apparatus for coagulatiug rubber latex cons1sting of an elongated cradle, an approximately central opening in top of said cradle through which the coagulant may be added to the latex during the osciln lating movement of the cradle, swinging link devices for supporting said cradle and means whereby said cradle may be swung 13o on said links for the purpose of producing an oscillating movement of the cradle, a trunnion-like connection between the ends of the cradle and theswinging links whereby the cradle may be turned over on one or both sides for the discharge of the contents, and means for locking the cradle in the vertical position.

8. An apparatus for coagulating rubber latex conslstin'g of an elongated oscillating cradle for receiving the latex, said cradle having an opening in its top through which the coagulant may be gradually added to the latex during the oscillating movement of the cradle the ends of the cradle being made to such a curvature that the to and fro motion will cause the liquid to run along to the ends and be then turned over by the curved ends and fall on to the top of the liquid in the base of the cradle without spilling.

9. An apparatus for coagulating rubber latex consisting of an elongated cradle, having an approximately central openin in its top the ends of the cradle bein mage to such a curvature that the to an fro motion will causetheliquid to run along to the ends and be then turned over by the curved ends on to the top of the liquid in the base of the cradle without spilling, swinging link, devices for supporting said cradle and means whereby said cradle. may be swung on said links for the purpose of producing an oscillating movement of the cradle.

10. An apparatus for coagulating rubber latex consisting of an elongated oscillating cradle in which the latex is caused to flow to and fro, said cradle having an opening in its top through which the coagulant may be gradually added to the latex during the oscillating movement of the' cradle,

means for permitting the cradle to pivot on its longitudinal axis and means for locking the cradle in its position of use, a double discharge chute beneath the cradle. whereby the cradle may be turned to one side to discharge the mother liquor and on the other side to discharge the coagulated latex.

11. An apparatus' for coagulating rubber latex consisting of an elongated cradle, an approximatel central opening in the top of said cradle, swinging link devices for supporting said cradle, and means whereby said cradle may be swung on said links for the purpose -of producing an oscillating movement of the cradle, a pivotal connec,

tion between the cradle and said links and a locking device for keeping the cradle in vertical osition while it is oscillated, a double d1scharge chute beneath the'cradle side to discharge the mother liquor/y and on the other side to discharge the ,coagulated latex.

12. An apparatus for coagulating rubber latex consistlng of an elongated cradle, an approximately central opening in the top of said cradle, swinging link devices for supporting said cradle and permitting oscillating movement thereof, a rotary crank device and connecting rod for imparting oscillation to said cradle. f-

13. An apparatus for coagulating rubber latexlconsisting of anelongated cradle, an approximately central opening in the top of said cradle, swinging link devices for supporting said cradle and permitting oscillating movement thereof, a rotary crank device and connecting rod for imparting oscillation to said cradle, a trunnion connection between the ends of said cradle andthe swinging links, means for locking the cradle in the vertical position and for permitting the cradle when released to be turned over to one side or the other for discharging the contents.

14. An apparatus for coagulating rubber latex-consisting of an elongated cradle, an' approximately central opening in the top tifl said cradle, swinging link devices for supporting said cradle, a rotary crank device and connecting rod for` imparting oscillation to said cradle, a pivotal connection between the cradle and said links `and a lock ing device for keeping the cradle in vertical position while it is oscillated, a double discharge chute beneath the cradle whereby the cradle may be turned to one side to discharge the mother liquor and on the other side to discharge the coagulated latex.

15. An apparatus for coagulating rubber Y latex comprisin fro motion, an dei'lecting the latex toward the middle of the cradle at the ends of the. to and fro movements of the cradle.

16.v An apparatus for coagulating rubber latex comprising a 'cradle having a to and fro motion, and-means in said cradle for deflecting the latex toward the middle of the cradle at the ends, said cradle being pivotally mounted and being adapted to be turned on its side for emptymg purposes.

In witness whereof, v I have hereunto signed my scribin wltnesses. v SA UEL CLELAND DAVIDSON. Witnesses: i Hoen` TAYLOR COULTER,

WILLIAMS PEoPLEs BLACK..

a cradle having a to and means in said cradle for name in the presence of two sub 

